Update Wiring Editor Copyright headers

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Add a widget and an operator for test endpoint reordering

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Add widget and operator endpoint reorder tests
Add tests for Wiring Editor Multiconnectors

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>

Conflicts:
	src/wirecloud/platform/wiring/tests.py
Remove context menu disable from PopupMenu
Improve anchor popup menus behaviour
Fix bug in the multiconnector tests: Native events is a feature only provided by the Firefox driver
Add a little wait to the Endpoint reordering tests
Force the use of native events when using FirefoxDriver (so we can make use of the release method)
Fix small bug
Remove get_iwidget_anchor
Remove iwidget_context
Fix SkipTests
Add more waits
Remove get_and_add_widget function
Fix bug. Destroying a widget or operator with two or more Multiconnectors in the same Anchor
Fix bug affecting Windows
Move waits for popup_menues to popup_menu_click
Bump Wirecloud version
Fix bug. Destroying a widget or operator with two or more Multiconnectors in the same Anchor

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>